awhile back i ask the question of what was the max back space i could use on my stock axles with 39.5 x 16.5 x 16 pit bull rocker tires and a 12 in wide 16 in dia marsh rims . i got lots of lookers but not one person would touch this question so i am happy to let everyone know that 39.5 x 16.5 x 16 pit bull rockers on marhall 12in wide by 16 dia works just fine . i have about 1 in clearance from the tie rod end to the tire and this is without a spingover lift . i am able to drive it just fine on the black top with no problems but off road making hard turns it does rub the inner fender just alittle so if i move the axle forward about 1 in to 1 1/2 or do a springover there wil be no issues with rubbing . im going to put up some pics but if there are up soon they will be up sometime soon i hope . i all so want to let you know how much i lke these tires they are great for me . im not a hard core die hard 4 wheeler but im no take it easy 4 wheeler either . i like getting in the mud and haveing fun and going up hill as well but i know when to give it hell and when not to as well . so back to the tires they do great for me in the mud and on the blacktop as well they are not very loud on the hard road but they do humm alittle but my stock tranny and t case are louder . they are smooth on the road and i never even had them balanced just mounted and put them on the truck they shake just alittle at 30 mph but at 35 it goes away . but i do plan on balancing they soon . great tire for the money and great on and off road too .